Question

我为我的discord-bot制作了一个功能，在修复和优化代码时遇到了问题。在Promise.all中调用后，函数突然返回undefined。这是有问题的功能：

function setupPlayers(message, tag) {

  let opp = tag.toString();
  opp = opp.substring(2, opp.length - 1).replace('!', '');

  return message.channel.guild.members.forEach((guildMember, guildMemberId) => {
    if (guildMemberId === opp) {

      const players = [];
      const player1 = message.author;
      const player2 = guildMember.user;

      if (Math.random() > .5) {
        players.push(player1, player2);
      } else {
        players.push(player2, player1);
      }

      message.channel.send(
        `${player1.username} challenged ${player2.username} to a game of tic tac toe!`
      );

      return players;
    }
  });
}

这是电话：

Promise.all([
    setupPlayers(message, tag),
    setupBoard(message, board, buttons)
  ])
  .then(([players, botMessage]) => {
    console.log(players);
  }

玩家在setupPlayers函数内定义，但在console.log（）中未定义。我使用了错误的退货吗？

Answer 1

通过从forEach循环中删除返回来解决它，将其他return语句移到循环之外并更改它以返回解析promise，如下所示：

 return Promise.resolve(players);

Promise.all函数返回undefined

1 个答案: